Zerstörungsfreie Festigkeitsuntersuchungen an Spanplatten mit Ultraschallmeßtechniken

Autor:	B. Plinke, D. Greubel
Přispěvatelé:	Publica
Rok vydání:	1995
Předmět:	Gynecology Physics medicine.medical_specialty nondestructive testing defect detection ultrasound Forestry Spanplatte Ultraschall particleboard Querzugfestigkeit shaer strength Fehlstellenerkennung internal bond strength Scherfestigkeit medicine zerstörungsfreie Prüfung General Materials Science
Zdroj:	Holz als Roh- und Werkstoff. 53:193-200
ISSN:	1436-736X 0018-3768
DOI:	10.1007/bf02716423
Popis:	The wood properties (high damping, anisotropy) play an important role for the ultra-sonic examinations of wood and wood-based materials. Ultra-sonic examinations of strength and defects are possible for solid wood but complicated due to the difficult coupling of probes to specimen. Informative investigations were carried out on three-layer laboratory particleboards with a modified ultra-sonic test device (type: USIP, manufacturer: Krautkrämer) as well as on an appropriate plant for the detection of defects (delamination) (type: UPU, manufacturer: GreCon). There, correlations turned up between the tensile strength and the sound velocity when coupling the probes to specimen in contact. Non-contacting scanning of boards with the fault (delamination) detection plant revealed a certain influence of pressing time and board temparature on the signal amplitude in the ultra-sonic receiver, however, it did not show meaningful correlations with the internal bond strength.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_dedup___::1cd378c0df8aff3822fbaf33a2731a4c https://doi.org/10.1007/bf02716423 Zobrazit plný text záznamu Full text from SpringerLink